modelPartialFlowHeatTransfer
base class for any pipe heat transfer correlation
Extends from TRANSFORM.Fluid.Pipes_Obsolete.ClosureModels.HeatTransfer.BaseClasses.PartialHeatTransfer (Common interface for heat transfer models).
Information
Base class for heat transfer models of flow devices.
The geometry is specified in the interface with the surfaceAreas[nHT], the roughnesses[nHT]
and the lengths[nHT] along the flow path.
Moreover the fluid flow is characterized for different types of devices by the characteristic dimensions[nHT+1]
and the average velocities vs[nHT+1] of fluid flow.
See Pipes.BaseClasses.CharacteristicNumbers.ReynoldsNumber
for example definitions.
Parameters
| Type | Name | Default | Description |
|---|---|---|---|
| Internal Interface | |||
| Integer | nHT (from PartialHeatTransfer) | 1 | Number of heat transfer segments |
| Boolean | use_k (from PartialHeatTransfer) | false | = true to use k value for thermal isolation |
| Ambient | |||
| SI.CoefficientOfHeatTransfer | k (from PartialHeatTransfer) | 0 | Heat transfer coefficient to ambient |
| SI.Temperature | T_ambient (from PartialHeatTransfer) | system.T_ambient | Ambient temperature |
| Internal Interface › Geometry | |||
| Real | nParallel | number of identical parallel flow devices | |
| Initialization | |||
| SI.CoefficientOfHeatTransfer | alphas_start | heat transfer coefficient | |
Connectors
| Type | Name | Default | Description |
|---|---|---|---|
| Modelica.Fluid.Interfaces.HeatPorts_a | heatPorts (from PartialHeatTransfer) | Heat port to component boundary |
Components
| Type | Name | Default | Description |
|---|---|---|---|
| Medium.ThermodynamicState | states (from PartialHeatTransfer) | Thermodynamic states of flow segments | |
| SI.Area | surfaceAreas (from PartialHeatTransfer) | Heat transfer areas | |
| SI.HeatFlowRate | Q_flows (from PartialHeatTransfer) | Heat flow rates | |
| Modelica.Fluid.System | system (from PartialHeatTransfer) | System wide properties | |
| SI.Temperature | Ts (from PartialHeatTransfer) | Medium.temperature(states) | Temperatures defined by fluid states |
| SI.MassFlowRate | m_flows | Mean flow rate in segments | |
| SI.Length | lengths | Lengths along flow path | |
| SI.Length | dimensions | Characteristic dimensions for fluid flow (diameter for pipe flow) | |
| SI.Area | crossAreas | Cross flow area of flow segments | |
| SI.Height | roughnesses | Average heights of surface asperities | |
| SI.CoefficientOfHeatTransfer | alphas | Coefficient of heat transfer |